Timing gears /coil engine with noise

[borchi1]

Hello, again here putting back my tuned Austin Seven.

I am testing the engine on a test bench, but the timing gears are very noisy at low speed,

there is play on the gears but doesn't seems so that much to justify the noise.

Is it normal or should i think of replacing?

I see they are not reproduced, is there anyone that had a spare set available for sale?

thank you